film dramatizing the raid that killed osama bin laden will make its debut just two days before the election. the national geographic channel denies there was any political motivation. it says the air date was chosen to kick off the fall season. >>> american airlines is cancelling or delaying dozens of flights today to fix a safety problem with its loose seats. the carrier says it is finally figured out what was causing the problem. here's abc's jim avila. >> reporter: american has grounded half its fleet of 757s, its domestic long-range workhorse, taking out for a second round of faa monitored fixes to prevent passenger seats from becoming dislodged in the air. the airline engineering team decided the locking mechanism that secures the seats to the floor, must be enhanced. >> we have a unique situation of a track that had become somewhat worn. and it was where some soda spilled down over time and allowed the seats to become dislodged. >> reporter: another setback for american airlines which suffered record delays in september, for what it claims were labor troubles. claiming its pilots inte